code: def __init__(
      self, model: str = "epwalsh/bert-xsmall-dummy", **kwargs
  ) -> None:
      super().__init__(**kwargs)
      self.tokenizer = PretrainedTransformerTokenizer(model)
      self.token_indexers = {
          "tokens": PretrainedTransformerIndexer(model)
      }
  
imports: from typing import List, Iterable, Dict
  import torch
  import pytest
  from allennlp.common.testing import requires_gpu
  from allennlp.data.instance import Instance
  from allennlp.data.dataset_readers import DatasetReader
  from allennlp.data.data_loaders import MultiProcessDataLoader, WorkerError
  from allennlp.data.fields import Field, TextField, MetadataField, TensorField
  from allennlp.data.tokenizers import PretrainedTransformerTokenizer
  from allennlp.data.token_indexers import PretrainedTransformerIndexer
  from allennlp.data.vocabulary import Vocabulary
  from allennlp.data.data_loaders.data_collator import LanguageModelingDataCollator
label_desc: Use image node_id 1 to create a new MockOldDatasetReader object from inherited base classes: DatasetReader with example: obj = MockOldDatasetReader(model)